Apparatus for installing semiplastic joint material in concrete roads



April 28, 1953 J. N. HELTZEI. 2,636,425

APPARATUS EOR INSTALLTNG sEMTRLAsTTc f JOINT MATERIAL 1N CONCRETE ROADS 3 Sheets-Sheet l Filed May 15, 1947 INVETOR BY www y/Y/E E ATTORNEYS J. N. HELTZEL FOR April 28, 1953 2,636,425 APPARATUS INSTALLING sEMIPLAsIIC JOINT MATERIAL IN CONCRETE ROADS 3 Sheets-Sheet 2 Filed May l5, 1947 Aw NN. NNN. \R

ATTORBYS lll. W

BY www April 28, 1953 J. N. HELT 2,636,425 APPARAT FOR INSTALLI SEMIPLAS JOINT TERIAL IN CONCRETE ROAD Filed May l5, 1947 3 Sheets-Sheet 5 y mx INVENTOR.

Patented Apr. 28, 1953 APPARATUS FOR INST ALLING SEMIPLASTIC JOINT MATERIAL IN CONCRETE ROADS John N. Heltzel, Warren, Ohio; The Union Savings & Trust Compa Carl J. Heltzel, execu zel, deceased ny of Warren,

Ohio, and

tors of said .lohn N. Helt- Application May 15, 1947, Serial No. 748,316 6 Claims. (Cl. 94-46) The present invention relates to improvements in apparatus for installing semi-plastic joint material in concrete and the like roads, and has for an object certain improvements over my prior Patents Nos. 1,946,972, granted February 13, 1934 and No. 1,982,387, granted November 27, 1934.

The present invention relates more particularly to improved methods and apparatus for installing joints in plastic concrete surfaces to keep pace with later developments in plastic sealing materials which have been produced for the forming and sealing of expansion and oontraction joints, in which the contraction joint vformed by the so-called dummy joint does not extend entirely through the thickness of the slab but which forms a plane of weakness for controlling the breaking of the concrete below the slab wherebyT the road which is laid as a monolith is divided along well defined and predetermined lines into a number of slabs separated by the expansion and contraction joints to enable the slabs to expand and contract relatively to one another.

The invention is useful in installing joints in plastic concrete surfaces such as revetments, roads, airports, etc., for the purpose of controlling or minimizing the cracking of the plastic material during the dehydration of such plastic material.

Among the new developments of joint sealing materials are substances which are semi-plastic and resist ow through the conventional joint installation devices in that these substances require comparatively great pressure to project the same through the mechanisms in order to form the proper section of joint material as it emerges from the installing device and into the plastic concrete of the road.

A primary object of the present invention is to provide an improved method and apparatus for dealing with semi-plastic materials in that the present invention provides a screw for developing enormous pressure to advance the semiplastic material through a hopper and ejection tube and to drive the same forcibly into the prepared groove in the concrete.

Another object of the invention is to provide in conjunction with the ejection installing mechanism groove forming and surfacing devices whereby the concrete in and around the installed joint may be immediately finished in a final manner.

Other objects of the invention are to improve the installing device and the apparatus for movably Asupporting the same upon the vcarriage whereby such installing device may be adjusted vertically and also has a longitudinal traverse on the main carriage to enable the same to move forwardly along the road while the main carriage remains stationary to perform its joint installing functions; and whereby subsequently the main carriage may be moved forwardly while the joint installing supplemental carriage remains stationary; all to the end of simplifying the installation of the new joint material in concrete roads and the consequent reduction in the expense of the same.

With the foregoing and other objects in view, the invention will be more fully described hereinafter and more particularly pointed out in the appended claims.

In the drawings, in which like parts are denoted by the same reference characters throughout the several views;

Figure 1 is a perspective view of a form of joint installing device constructed in accordance with the present invention and shown in connection with the concrete road under construction and with portions of a carriage traveling in the customary manner upon the side road forms;

Figure 2 is a vertical section taken through the hopper, worm tube, depositorand associated implements;

Figure 3 is a side elevational view of the joint installing device, with the supporting carriage diagrammatically illustrated;

Figure 4 is a vertical section taken through dual joint material depositors with lubricating means and grooving means associated therewith.

Referring more particularly to the drawings,

i I designates the main supporting carriage, which is supported as usual upon wheels 2 that travel on the side forms 3. Such construction is shown in my prior Patent 1,982,387 and is merely diavgramrnatically illustrated to show the supporting means for the joint installing device.

The main carriage may carry various implements for screeding, surfacing, compacting the road, forming grooves in which the joint material is to be installed, and various surfacing devices, all in accordance with common practice, some of which devices are 'disclosed in my above numbered prior patents.

One or more platforms carried bythe main carriage I are provided on which workmen may move and be supported to attend to the operations of the agenci'es'above referred to and the new joint installing device.

The joint installing device is slidable back and varracher.

along wheels 23`and21, the supplemental car= riage .25 being stationary. .This movement of the main carriage brings the supplemental carriage 25 again to a rear origin position upon the rails I9. This relative movement of the two carriages is permitted by the easy paying out vof the cable 29 from the windlass 39. Thus the main carriage is enabled to advance approximately ten feet ahead, performing its operations of screeding, surfacing, etc. as it moves. The main carriage is then again halted'and supplemental carriage 25 moved forward relatively thereto to resume its joint installing operation.

Referring more particularly to Figure 4, it may be important at times to lubricate the walls of the main chute. To accomplish this there is provided a lubricant holding chamber 9| which may be mounted on the main chute or worm tube 92. The lubricant 'in the chamber 9| is placed under pressure by the piston 93 operated by the hand wheel 99 through the screw shaft 95 turning in the stationary nut 9S. By rotating the hand Wheel 99 in a proper direction the screw shaft 95 is moved downwardly through the stationary nut 95 which forces the piston or plunger 93 downwardly in the receptacle 9|. This action forces the lubricating material through minute perforations in the perforated bottom plate 91 in the bottom of the receptacle 9| which forms a division between the lubricant receptacle 9| and the interior of the worm tube 92. The lubricant in small diameter multitudinous jets will be projected forcibly into the main chute and will lubricate the side walls of the chute so as to reduce the friction of the plastic filler material.

It may be desirable in some cases to project two different kinds of material into the concrete groove. In other words part of the groove may be filled with a semi-plastic material 98, which is forced from the main chute into the bottom part of the concrete groove. A less plastic material 99 is forced from an auxiliary hopper |09 by the screw threaded hand operated pressure screw |9|. A narrow tube |92 connects the bottom of the auxiliary hopper |90 with a discharge nozzle |93 arranged adjacent the mouth |04 of the depositor. Lubricant connections |05 are made to the lower portion of the inside walls of the auX- iliary hopper |99 and Alemite fittings |00 or other desired ttings are parts of the equipment of the connections |95 to enable lubricant to be forced into the auxiliary hopper |99. Such lubricant will reduce the resistance of the non-plastic material moving through the auxiliary hopper |99 and the tube |02 whereby such material may be more conveniently discharged into the top portion of the groove in the plastic concrete as indicated at 99. The lubricant chamber 9| and auxiliary hopper |09 and associated structure may be mounted on the chute in the modification of Figs. l and 2 if so desired, as illustrated in the drawings, and functions identically to the aforedesoribed function of these parts respecting the modification illustrated in Fig. 8.

It will be understood that by4 using two grades of material, that is the denser or less plastic material at the top of the groove, the same will permit the finishing tools to be operated over this semi-hard material and will also tend to confine the more plastic material in the bottom of the groove during the Various operations.

t is also understood that preliminary to the installing of the material the coarse aggregate is separated, as indicated at |91, by use of a grooving tool |08. This grooving tool |08 may 6.- be operated-byv'hand or otherwise fas-may be de. sired. The grooving tool `-isoperated-alongthe rack' or track |09 forming?A part of the carriage, rollers ||9 being shown ,as rolling along said track |99 and carrying the grooving tool |08. f

It will also be understoodthat the entire grooving and installing apparatus is mounted jon a movable carriage which spans the plastic surfacing structure. The track |99may be arranged so it is adjustable up and down as may be required.

While I have'disclosed herein the best form of the invention known to me at vthev present time, I desire it to be understood that Iv reserve theright to make changes and modications'in'the herein described embodiment of the invention provided such changes fall within the scope of the following claims. n v What I claim is: 1

l. An apparatus for installing joint material in concrete surfacing structures comprising a main carriage, tracks suspended adjustably from said main carriage'and lying in a horizontal plane, .a supplemental carriage 'supported and movable 4on said track, a hopper for receiving semi-plastic joint material supportedk by said supplemental carriage, a worm chamber positioned to receive the joint material from the hopper, an extrusion tube communicating withsaid worm chamber and having a nozzle portion adapted to extend into the concrete and having a rearwardly directed discharge oriiice for depositing the semi-plastic joint material immediately in the concrete, means lpreceding the nozzle portion for grooving the concrete in advance and in alignment with the nozzle portion, a movable worm in said worm chamber for driving the semi-plastic material from the hopper to the nozzle portion and discharge orice, a float suspended from the supplemental carriage over the nozzle portion in position to engage the surface of the concrete, and means to adjust said oat b-oth vertically and longitudinally of the joint.

2. An apparatus for installing joint material in concrete surfacing structures comprising a carriage, means whereby said carriage may be moved over the concrete structure, a depositor on said carriage adapted to receive semi-plastic joint material and having a nozzle portion for engaging in the plastic concrete and having arearwardly disposed discharge orice for discharging the joint material directly and immediately in the concrete, means to force with great pressure the semiplastic joint material through said depositor, a lubricant reservoir, a follower plunger movably mounted in the reservoir, screw means to exert great pressure on said follower plunger, and a perforated wall between said lubricant reservoir and the interior of the depositor for dividing the lubricant into numerous small diameter portions as the same is admitted to the depositor.

3. An apparatus for installing joint material in concrete surface structures as claimed in claim 1 characterized by the fact that said last named means comprises turn buckles connected between said supplemental carriage and both the end and rear portions of said float.

4. An apparatus for installing joint material in concrete surface structures as claimed in claim 1 characterized by the fact that said last named means comprises side turn buckles coupled to said supplemental carriage and to the end portions of said float. and rear turn buckles extending dinemesis 'fiiryeewelf tss@ frere permises sas-if non se'fci-seijprneetei senese;

5; ifapiitus frisfiihg jbintfmariei in 'ilbrte surf r 'strtiiis s clim'ed claim 2 furtl'i'l" foxrpris'ing4 a: container for a; less plastic material,- 'means fof fore-ing theV less plastic meterial fromA said` 'container,-` ancl e.- nozzle lead-ing from seid 'continer to tl'i'e rear of the first mentioned nozzlel portion whereby to deposit the less plastio material on top of the semi-plastic material being extruded from said nozzle portion 6.' An eppartus for installing joint materiell in eonoretev surfacing structures comprising a 'niain carriage, treks suspended adjustably from said main carriage,- 9; supplemental carriage mvably i'i'miinedI on"saicl tracks, aiv `hopper for receiving 'semi-plest-ie4 joint material supported by said supplemental carriage, a Worin chamber positioned to receive the jointmateri'al from the hopper,- an extrusiontuli'e communicating With said Wormohamloei' andhaving *anozzlel portion dapted to' extend vinto-the concrete and having a discharge oriicev for depositing the semi-plastic `joint materiel immediately in the concrete; means 8 preceding'- the'F nozzle ptionforl g'ieoving the eoneretef advaiice and in alignment with the nozzle portion, a, movable' Worm in' said worm chamber for? driving the semieplastie material from the hopper' to the nozzle portion and dis charge` orioe'; aoat suspended from the sup-i pieni-entail carriagel over' the nozzle portionA and positioned to engage 'the surface of the concrete; and-means toadjustseid- Aloetboth vertically and longitudinally of the joint,v and means fori lub-ri` eating the interior of the nozzle.

JOHN N. HELTZEL.

References oued'- in the me of thisy patent UNITED STATES PATENTS number y Name Date 1,0536515 Reimer Feb'. '18, 1913 1,828,738 Hood Oct. 27, 1931 14829579 Elkins Oct'. 27, 1931 1,945,972 IfI'eltzel Feb. 13, 1934 1,932,387 Heltz'el Nov. 27, 1934 v2,013,407 Gibbs Sept. 3, 1935 2,035,627 West Mar. l, 1936 

